package main
import (
    "strings"
    "fmt"
    "io/ioutil"
	"net/http"
)
func main(){
    client := &http.Client{}
    req, _ := http.NewRequest("POST","https://gamebox-fin.meituan.com/api/cardholder/api/activity/participateActivity",strings.NewReader("{\"cardMetaId\":\"7\",\"activityId\":\"20\",\"riskLevelMap\":{}}"))
    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("Cookie", "token=-oVAtAYRwR1RpLsc09UXRVZVrWoAAAAARgwAAGmvPmkHSfkM0KY0leErzrRhIf4ha_mv1Kfh6GQRKh56IMWr-nvUNJwEkOeDpoQjfQ")
    res, _ := client.Do(req)
    defer res.Body.Close()
    body, _ := ioutil.ReadAll(res.Body)
    fmt.Println(string(body))
}